steviejasminewalker
contestada

Three items were bought at a car boot sale.
Item A
Mass = 42 grams
Volume = 2 cm
Item B
Mass = 87.5 grams
Volume 5 cm3
Item C
Mass = 147 grams
Volume = 7 cm3
=
The density of platinum is approximately 21 grams per cmº.
Which of the items cannot be platinum?
You must show your working.

Respuesta :

sqdancefan

9514 1404 393

Answer:

  Item B

Step-by-step explanation:

The mass of platinum with the given volumes would be ...

  A: (2 cm³)(21 g/cm³) = 42 g . . . matches the given mass

  B: (5 cm³)(21 g/cm³) = 105 g . . . greater than the given mass, which is not platinum

  C: (7 cm³)(21 g/cm³) = 147 g . . . matches the given mass

__

Item B is too light to be platinum.

JosephGilchrist

Answer:

Item B

Step-by-step explanation:

item b is too light

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